Malicious PDF — malware analysis report

Static analysis result for SHA-256 309bdcd8e0829b93…

MALICIOUS

PDF

40.3 KB Created: 2020-10-11 11:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 16e40bca4c2fcc20b77dac9579bdca33 SHA-1: d839196dd2f1b0d356ce478abd948007b72f67ac SHA-256: 309bdcd8e0829b936fa38d174bd7d4d81a7e808b1b1270545f13cc7c3eb42c67
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=50+shades+darker+full+movie+download+filmywap In PDF document text
    • http://files.stsrx.com/uploads/1/3/1/4/131452817/4127504.pdfIn PDF document text
    • http://files.icmhindy.org/uploads/1/3/1/4/131437474/6143846.pdfIn PDF document text
    • http://files.creating-coaching-cultures.com/uploads/1/3/1/8/131871569/319103.pdfIn PDF document text
    • http://vibuxuta.cranehistoricalsociety.org/uploads/1/3/1/8/131856979/fupezunarosaji_bufonagatosud_sigonini_bonazulolezof.pdfIn PDF document text
    • http://bixekozu.layouthandgovernment.org/uploads/1/3/0/8/130813306/nebatopapewetomaral.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f35ed4-805c-453b-94bd-d9257f534d52/tebipulopurul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36346094-be49-43bd-b3d1-74c20a770b0e/92918331019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2dbf2f-3d4c-4352-a8b7-cf4940346c6f/79183862219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b3f34f-aa19-4aed-83a8-35a1e368e86a/85330989236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2569/7434/files/tixumilar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/jimmy_neutron_granny_baby_episode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b794ec-153d-46e3-9142-a0605ef1e329/jatakejexifumopugavesinov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50c2798-ca62-41ca-9bba-a69611e0c734/vazij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56af3da3-e051-4c26-b157-11ec7a018058/87248027413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c128f4-5afd-4a2b-90ac-35a0030bfc55/50880983304.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D39 5772 bytes
SHA-256: b6eecb397bd399bb733d4e413c21592e00eeafcaffefd37dc3cf06e40bb2ab1b
font_01_sfnt_off000070cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CB 10412 bytes
SHA-256: 7e1b7a9a7480aa6563aa4a5879ad2ed8d76904db91def7429b2f4fe7c5ba55d4

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